If you've got a blog or website, there's lots of money to be made by seeking out and posting relevant affiliate links. Lots of big companies offer affiliate programs that give you a commission on purchases made through your unique links. It's best to use an affiliate link that's relevant to your site's focus; for example, if you're hosting a beauty blog, Sephora and other makeup brands offer affiliate opportunities, while a financial blog would likely see more success posting affiliate links for credit cards and other financial services.

If you have a lot of clutter taking up space in your home, try selling it on your local Facebook auction pages. Most of these pages work by having members post a photo album of their items for sale for a period of 24 to 48 hours, during which time other members bid on the items in the photos in fifty cent increments until the predetermined end time. If you don't have your own items to sell, try selling on behalf of other group members who don't have time, and split the profit.

Head to your local thrift shop and hunt for items you can clean up and sell on local buy and sell pages like Kijiji, Craigslist, Varage Sale or even eBay. If you're interested in fashion and know brand names, it's easy to make a profit selling gently used items on sites like Poshmark.

Although it won't make you much, there are reputable online survey companies that will pay you cash to answer questions about products, services, and your lifestyle. Usually, these surveys pay in points that can be traded for cash or gift cards, and although the pay is typically no more than a few dollars per survey, it's a good way to contribute to your rainy day fund.

If you're a quick typist, find a website that hires transcriptionists to work online. Usually, these sites will allow you to accept jobs whenever you're available and work on them from home at your own pace -- as long as you meet your deadline. Depending on your location, you may be able to have your paycheck deposited directly to your bank account. Otherwise, most sites offer the option to receive your pay via PayPal or a similar website.

If you've got some talent and creativity, making money as a freelance writer is fairly simple. There are plenty of content creation services that frequently hire writers for product descriptions, blog posts, and other web content. Usually, these services pay by the word and allow you to work according to your schedule. If you work often, it's possible to make a full-time income freelance writing, but it's also a great way to supplement in your spare time.

Many people are looking for a good deal on house-cleaning or someone to watch their pets while they're on vacation. If you're able to provide proof of no criminal record and can show you're trustworthy, undertaking either of these tasks is a great way to make some extra cash.

If you have an extra property or live in an area popular with tourists, try renting out your home on Airbnb or other vacation rental websites. You can post it for rent during peak vacation times or your own vacation, and carry on living in your home as usual the rest of the year.

Apps like Acorn will connect to your bank account to round up all of your purchases to the nearest dollar, banking the excess and depositing them into an investment account on your behalf. Although the deposits seem small, the average user saves up to $1000 every two to three years.

Direct sales have changed since the days of home parties and door knocking. Today, it's easy to join a direct sales company and do your job entirely from your phone or laptop. Most direct sales parties are hosted on Facebook, and sellers can complete the entire sales process online. Many items are sold via direct sales including jewelry, cleaning products, beauty products, and even housewares.